Interlockable metal corner.



C. W. MORTON. INTERLOCKABLE METAL CORNER.

APPLICATION FILED 'ocr. 22. 1914.

/ Z f g CQLUMBIA PLIANOORAPH CO WASHINGTON, D. c.

Patented Dec. 7, 1915.

UNllTElD if @FldlQlE.

CLIFFORD NALDO MORTON, OF SANDUSKY, 01-510, ASSIGNOE TO THE HINDE DAUGHPAFEP. COMPANY, 01? SANDUSKY, OHIOQA CORPORATION OF OHIO.

INTERLOCKAIBLE METAL CORNER.

Application filed October 22, 1914.

To all whom it may concern Be it known that I, Cmrrono VVALDO Mormon, acitizen of the United States of America, residing at Sandusky, in thecounty of Erie and State of Ohio, have invented certain new and usefulImprovements in lnterlockable Metal Corners, of which the following is aspecification, reference being had therein to the accompanying drawings.

The invention relates to interlockable metallic corner constructiondesigned for application to various articles such as paper boxes.

It is the object of the invention to provide a construction formed ofseparable sections which may be applied to the flat blank and whichpermits of the shipping of said blanks in knock down condition.

It is a further object to provide a means of interlocking engagementbetween the.

sections permitting of quickly assembling the boX and securely holdingthe adjacent sides thereof from displacement.

Still further, it is an object to combine the interlocking means with areinforcement for the box or other article which contributes to thestrength of the latter.

In the drawings: Figure 1 is a perspective view showing my improvedconstruction applied to a box blank, two of the sides being in assembledposition; Fig. 2 is a longitudinal section through the corner; Fig. 3

is a plan view of the blank from which one of the corner sections isformed; and Figs. and 5 are cross sections showing respectively thesections during and after interlocking engagement.

My improved interlockable corner comprises two sections A and B,preferably formed of sheet metal and adapted to be applied to theadjacent sides of a box blank or other article. Each section ispreferably bent into a U-shaped cross section to embrace the side of thebox to which it is attached, and one or more prongs C are formed forperforating the paper and for clenching on the opposite side of thesame, as shown at D Fig. 2.

The interlock between the sections is formed by a projecting undercut ordovetail tongue member E, which engages an entering slot F in thecomplementary section and may then be moved laterally into a narrowerslot G up against a shoulder H at Specification of Letters Patent.

Patented Dec. Z, i915.

Serial No. $68,032.

the end of said slot. Disengagement is prevented by a spring tongue orkeeper preferably formed of the metal struck out from the slots F and Gand operating to spring over the tongue E when against the shoulder H.Thus, as shown in Fig. 2, the two sections A and B when engaged are sointerlocked as to prevent displacement in any direction. It will also beobserved that said sections stand at right angles to each other andtherefore form a square corner; further, that in the construction asspecifically shown the tongue E bears against a shoulder H formedby theportion of the sheet metal which is bent around the. edge of the paperblank, and therefore that the side to which the section A is applied issubstantially in the plane of the end of the adjacent side.

The sections A and B may be readily formed by die operations and may beautomatically applied to the paper blank. 'When thus applied the springtongue or keeper I is depressed below the surface of the blank so as topermit of the insertion of the tongue E and the abutment of the end ofthe section A against the side of the section B. There are no outwardprojections on the sides of the members A and B, and therefore theblanks to which they are applied may be stacked in knock down position,lying flat against each other.

What I claim as my invention is 1. An interlockable corner construction,comprising sheet metal sections attachable respectively to the adjacentsides of the article to which they are applied, one of said sectionshaving a projecting undercut tongue and the other having a lockingrecess in its side with an entrance slot for receiving said tongue andhaving a resilient keeper for preventing disengagement.

2. An interlockable corner construction, comprising sheet metal sectionsbent to embrace the respective sides of the article to which they areattached, one section being provided with an undercut tongue projectingbeyond the end of its side in the plane thereof and the other having aportion struck inwardly to thereby form a looking recess with anentrance slot for receiving the tongue, said inwardly-struck portionforming a keeper for holding said tongu from disengagement.

3. A11 inter-lockable corner construction,

comprising sheet metal sections bent to em,- brace the respective adacent sldes of the article to which it is attached and forming vsideandthe other section having an inwardly-struck portion providing a lockingrecess with an entrance slot at its inner endand a shoulder at its outerend, said inwardly struck portion forming a spring keeper for holdingsaid tongue from disengagement. I

'5. An interlockable corner construction, comprising sheet metalsections having por- 'member carried by the other part, formed with aslot having a portion through which the tongue may be passed and havinga comparatively narrow locking portion.

In testimony whereof I afiix my signature in presence of two witnesses.

CLIFFORD \VALDO MORTON.

Witnesses SIDNEY FRoMAN, FRED EMMONS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

' Washington, D. C.

